using FlowerShopDataModels.Models;
using FlowerShopContracts.ViewModels;
using FlowerShopContracts.BindingModels;
using System.ComponentModel.DataAnnotations.Schema;
using System.ComponentModel.DataAnnotations;

namespace FlowerShopDatabaseImplement.Models
{
    public class Flower : IFlowerModel
    {
        public int Id { get; set; }
        [Required]
        public string FlowerName { get; set; } = string.Empty;
        [Required]
        public double Price { get; set; }
        private Dictionary<int, (IComponentModel, int)>? _FlowerComponents = null;
        [NotMapped]
        public Dictionary<int, (IComponentModel, int)> FlowerComponents
        {
            get
            {
                if (_FlowerComponents == null)
                {
                    _FlowerComponents = Components
                    .ToDictionary(recPC => recPC.ComponentId, recPC =>
                   (recPC.Component as IComponentModel, recPC.Count));
                }
                return _FlowerComponents;
            }
        }
        [ForeignKey("FlowerId")]
        public virtual List<FlowerComponent> Components { get; set; } = new();
        [ForeignKey("FlowerId")]
        public virtual List<Order> Orders { get; set; } = new();
        public static Flower Create(FlowerShopDatabase context, FlowerBindingModel model)
        {
            return new Flower()
            {
                Id = model.Id,
                FlowerName = model.FlowerName,
                Price = model.Price,
                Components = model.FlowerComponents.Select(x => new FlowerComponent
                {
                    Component = context.Components.First(y => y.Id == x.Key),
                    Count = x.Value.Item2
                }).ToList()
            };
        }
        public void Update(FlowerBindingModel model)
        {
            FlowerName = model.FlowerName;
            Price = model.Price;
        }
        public FlowerViewModel GetViewModel => new()
        {
            Id = Id,
            FlowerName = FlowerName,
            Price = Price,
            FlowerComponents = FlowerComponents
        };
        public void UpdateComponents(FlowerShopDatabase context, FlowerBindingModel model)
        {
            var FlowerComponents = context.FlowerComponents.Where(rec => rec.FlowerId == model.Id).ToList();
            if (FlowerComponents != null && FlowerComponents.Count > 0)
            {
                context.FlowerComponents.RemoveRange(FlowerComponents.Where(rec
               => !model.FlowerComponents.ContainsKey(rec.ComponentId)));
                context.SaveChanges();
                foreach (var updateComponent in FlowerComponents)
                {
                    updateComponent.Count = model.FlowerComponents[updateComponent.ComponentId].Item2;
                    model.FlowerComponents.Remove(updateComponent.ComponentId);
                }
                context.SaveChanges();
            }
            var Flower = context.Flowers.First(x => x.Id == Id);
            foreach (var pc in model.FlowerComponents)
            {
                context.FlowerComponents.Add(new FlowerComponent
                {
                    Flower = Flower,
                    Component = context.Components.First(x => x.Id == pc.Key),
                    Count = pc.Value.Item2
                });
                context.SaveChanges();
            }
            _FlowerComponents = null;
        }

    }
}